(19)

(11)

EP 3 784 978 A1

(12)

(43) Date of publication: 03.03.2021 Bulletin 2021/09 (21) Application number: 19719360.0 (22) Date of filing: 23.04.2019

(51) International Patent Classification (IPC):  G01B 1/00(2006.01) G01B 7/012(2006.01) G01B 7/34(2006.01) G01B 5/012(2006.01) G01B 5/28(2006.01) (86) International application number: PCT/GB2019/051133 (87) International publication number: WO 2019/207294 (31.10.2019 Gazette 2019/44)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 26.04.2018 GB 201806830 (71) Applicant: Renishaw PLC Wotton-under-Edge, Gloucestershire GL12 8JR (GB)	(72) Inventors: LUMMES, Stephen, Edward Gloucestershire GL12 8JR (GB) HOLMES, Mark, James, Andrew Gloucestershire GL12 8JR (GB) (74) Representative: Dunn, Paul Edward  Renishaw plc Patent Department New Mills Wotton-under-Edge, Glos. GL12 8JR Wotton-under-Edge, Glos. GL12 8JR (GB)